<template>
  <div>
    <div style="width: 600px; background: #fff; margin: 50px auto; padding: 30px 60px;">
      <h1 style="text-align: center; margin: 20px 0;">管理员登录</h1>
      <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="ruleForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="ruleForm.password"></el-input>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="submitForm('ruleForm')">登录</el-button>
          <el-button @click="resetForm('ruleForm')">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        ruleForm: {
          username: 'root',
          password: '123456'
        },
        rules: {
          username: [
            { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 4, max: 15, message: '长度在 4 到 15 个字符', trigger: 'blur' }
          ],
          password: [
            { required: true, message: '请输入密码', trigger: 'blur' },
            { min: 4, max: 15, message: '长度在 4 到 15 个字符', trigger: 'blur' }
          ]
        }
      };
    },
    methods: {
      submitForm(formName) {
        this.$refs[formName].validate((valid) => {
          if (valid) {
            let url = 'http://localhost:9081/admins/login';
            console.log('url = ' + url);
            let formData = this.qs.stringify(this.ruleForm);
            this.axios.post(url, formData).then((response) => {
              let responseBody = response.data;
              if (responseBody.state == 20000) {
                this.$message({
                  message: '登录成功！',
                  type: 'success'
                });
                // 获取服务器端响应的JWT，并存储到LocalStorage
                let jwt = responseBody.data;
                console.log('登录成功，服务器响应的JWT=' + jwt);
                localStorage.setItem('jwt', jwt);
                this.$router.push('/sys-admin/index');
                // 以下是测试
                // let localJwt = localStorage.getItem('jwt');
                // console.log('从LocalStorage中读取JWT：' + localJwt);
              } else {
                this.$message.error(responseBody.message);
              }
            });
          } else {
            console.log('error submit!!');
            return false;
          }
        });
      },
      resetForm(formName) {
        this.$refs[formName].resetFields();
      }
    }
  }
</script>

<style>
  body {
    background: #12487d;
  }
</style>